Tuesday, November 5

Chemistry Chapter # 7 Part 1

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1. The naturally occurring process proceed with thea.Increase of energyb.decrease of energyc.none of thesed.both of these2. If the heat content of B is greater than that of A,the reaction A ---->B isa.Endothermicb.Exothermicc.Instantaneous d.Spontaneous3. The entropy of universea.Tends towards a Maxb.Tends towards Minc.Tends to zero d.Remain constant4. The exothermic process is a.evaporationb.sublimationc.respirationd.boiling5. K.E of molecules of gaseous substance is due toa.vibrational energyb.translational energyc.rotational energyd.sum of all these6. spontaneous reactions area.reversibleb.irreversiblec.none of thesed.not irreversible7.For the reaction NaOH+HCl ---> NaCl+H2O the enthalpy change is calleda.heat of formation of waterb.heat of formation of NaClc.heat of neutralizationd.heat of reaction8.At constant volume qv is=a.delta Hb.delta Ec.delta Pd.delta V9. The first law of thermodynamics is merely the law ofa.conservation of massb.conservation of energyc.conservation of mass & energy10. In a bomb calorimeter the reactions are carried out ata.constant volumeb.constant temperaturec.constant pressured.keeping all parameters11. The net change in a chemical reaction is same whether is takes place directly or indirectly isa. Henry's lawb. Charle's lawc. Hess's lawd. Graham's law12. Heat of reaction depends ona.pressureb.volumec.temperatured.all of above13. The process of evaporation of liquid is accompanied bya.decrease in enthalpyb.decrease in entropyc.increase in enthalpyd.no change in free energy14. Which thermodynamic property provides a measure of randomness in system?a.enthalpy b.entropyc.free energyd.density15. Which of the following is not a state functiona.enthalpyb.workc.entropyd.internal energy16. Bond breaking process isa.exothermicb.endothermicc.some exothermic and some endothermicd.no energy change17. In exothermic reaction,when heat is given out the temperature of the systema.increasesb.decreasesc.remain samed.same at room temperature18.Internal energy is sum ofa. K.E & heat energyb. K.E onlyc. K.E,P.E, vibrational,rotationald. none of above19. In which of the following neutralization reaction,will the heat of neutralization be highest?a.NH4OH & H2SO4b.HCl & NaOHc.CH3COOH & KOHd.CH3COOH & NH4OH20. When a solid is converted into liquid entropya.becomes zerob.decreasec.increased.remains the same21. Consider a chemical reaction CO2(l) --->CO2(g)(endothermic)the enthalpy changea.delta H< zerob.delta H> zeroc.delta H= zerod.none22. Which change would have the negative value of delta Ha.Na(s) --->Na (g)b.Cl(g)+ e- ---> Cl-1 (g)c.Na(s) ---> Na+1(g) + e-d.Cl2(g) ---> 2Cl(g)23. A spontaneous change is one in which the system suffersa.increase in internal energyb.lowering of free energyc.lowering of entropyd.no energy change24. which of the following gases has the highest heat of combustion?a.Methaneb.Ethanec.Ethylened.Acetylene25. Which of the following is not application for a thermo chemical reaction? a. It tells about the physical state of reactants and products.b. it tells whether a reaction is exothermic or endothermicc. it tells about the allotropic form(if any) of the reactantd. it tells whether a reaction is possible or not.